Soundiron is a developer of virtual instruments and sample libraries, founded in 2011 by Mike Peaslee, Gregg Stephens, and Chris Marshall. The company specializes in deeply sampled content for Native Instruments Kontakt, with additional support for platforms like Ableton Live and Propellerhead Reason, aimed at film, TV, game, and production composers.

The company's catalog spans orchestral sections, solo instruments, choirs and solo vocalists, epic percussion, folk and world instruments, rare and vintage keyboards, and cinematic sound design tools. Notable releases include the Mars and Venus choir libraries, the Voices of Rapture vocal ensemble, the Alpha Organ, Hyperion Strings, Apocalypse Percussion, and the regularly updated Omega Bundle collection that packages many of their titles together.

Soundiron has built a reputation for capturing unusual acoustic sources — antique pianos, abandoned organs, experimental metal and glass instruments, field recordings — alongside more traditional orchestral and choral content. Their libraries are widely used by media composers working in film, television, and video games.

Soundiron has 218 products cataloged on Equipboard, including Kontakt Instrument and Virtual Instrument. Their gear is featured by 5 artists, with the strongest followings in Electronic, Orchestra, and Stage & Screen. Notable users include Trevor Morris, River Boy, and Xtrullor. Most Soundiron products sit on the budget-friendly end of the spectrum.